Contributions to hysteresis in magnetocaloric materials
File(s)
Author(s)
Cohen, Lesley F
Type
Journal Article
Abstract
Hysteresis is detrimental to the refrigeration cooling cycle efficiency and yet many of the magnetocaloric materials under consideration as solid state refrigerants possess this property. This article discusses some aspects related to the factors leading to hysteresis in real materials. In the absence of high quality single crystals, determining the intrinsic energy cost associated with the transformation between metastable phases is an experimental challenge. We describe a micro‐calorimetric method that provides valuable insight into intrinsic behavior with the sensitivity to measure micro‐crystallites. We show that there is no correlation between the strength of first order character and magnitude of hysteresis between material families. We review some of the extrinsic factors which contribute to the hysteresis in real materials particularly those that can be accounted for using local imaging techniques such as scanning Hall probe microscopy. We discuss a number of mechanisms by which the extrinsic hysteretic properties of a material can be modified.
Date Issued
2017-09-18
Date Acceptance
2017-07-18
Citation
Physica Status Solidi B: Basic Solid State Physics, 2017, 255 (2)
ISSN
0370-1972
Publisher
Wiley
Journal / Book Title
Physica Status Solidi B: Basic Solid State Physics
Volume
255
Issue
2
Copyright Statement
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the article, which has been published in final form at https://dx.doi.org/10.1002/pssb.201700317
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000424935700009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Condensed Matter
Physics
calorimetry
hysteresis
magnetic transition
magnetocaloric materials
ELECTRON METAMAGNETIC TRANSITION
MAGNETIC REFRIGERATION
PHASE-TRANSITIONS
PERFORMANCE
LA(FE0.88SI0.12)(13)
KINETICS
FIELD
Publication Status
Published
Article Number
ARTN 1700317